Structure and Material Composition
The construction of a control cable is optimized for flexible, multi-circuit signal transmission and protection against interference.
Conductor: Typically made of copper for superior conductivity, though aluminum may be used. The conductor cross-sections are relatively small, ranging from 0.5 mm² to 10 mm². A defining feature is the high number of cores, commonly from 2 to 61 cores, packed into a single cable to manage multiple control circuits efficiently.
Insulation: Individual conductors are insulated, usually with Polyvinyl Chloride (PVC) or Cross-Linked Polyethylene (XLPE). This layer provides essential electrical isolation between the cores.
Shielding (Optional): For environments with significant electromagnetic interference (EMI) from nearby power cables or heavy machinery, a copper tape or braided shield is often added. This shield protects the sensitive control signals from distortion, ensuring signal integrity.
Armouring (Optional): For cables installed in harsh environments, directly buried, or requiring extra mechanical protection, a steel wire or tape armour layer is applied. This guards against crushing, impact, and rodent damage.
Outer Sheath: The final protective layer is a durable PVC sheath. It provides overall mechanical strength, resistance to abrasion, oils, and chemicals, ensuring long-term reliability in industrial settings.